VictronMPPT-ESPHOME

ESPHome component to monitor a Victron device (MPPT, SmarShunt, BMV, Phoenix Inverter ... ) via ve.direct / UART TTL

Supported devices

All Victron devices providing a ve.direct port.

Tested devices

• Victron SmartSolar MPPT 75/15

• Victron SmartSolar MPPT 100/15

• Victron SmartSolar MPPT 100/20

• Victron BlueSolar MPPT 100/30

• Victron SmartSolar MPPT 150/35

• Victron SmartSolar MPPT 150/45

• Victron SmartSolar MPPT 150/60

• Victron SmartSolar MPPT VE.Can 150/100 rev2 (Using VE.Direct port)

• Victron SmartSolar MPPT 250/70

• Victron Phoenix Inverter 12/500

• Victron Blue Smart IP65 Charger 12|25

• Victron SmartShunt 500A/50mV

Requirements

• ESPHome 2024.6.0 or higher.
• Generic ESP32 or ESP8266 board

Schematics

Attention: The TX voltage of the VE.Direct interface depends on the product: Some are 5V, others 3.3V!

Please measure the voltage between TX and GND. In case of a logic level of 5V you should add a voltage divider or logic level converter between the ESP and the Victron device.

                UART-TTL
┌────────────────┐                ┌──────────────────┐
│           GND o│<-------------->│o GND             │
│ Victron    TX o│--------------->│o D7   ESP32/     │
│ Charger    RX o│                │       ESP8266    │<-- GND
│            5V o│                │                  │<-- 3.3V
└────────────────┘                └──────────────────┘

# UART-TTL jack (JST-PH 2.0mm pinch)
┌─── ─────── ────┐
│                │
│ O   O   O   O  │
│GND  RX  TX VCC │
└────────────────┘

If you are unsure about to pin order please measure the voltage between GND and VCC (5V). If you measure a positive voltage you know the position of VCC and GND!

JST-PH jack (direct connection noninsulated)

Pin	Purpose	ESP8266 pin	ESP32 pin
1	GND	GND	GND
2	RX
3	TX	D7 (RX)	GPIO16 (RX)
4	5V

note: JST-PH connector on this image has lock downwards

note: Level shifter (5V<->3.3V)between esp32 and mppt is not necessary (tested on esp32 nodemcu v1 and MPPT 75/115 , MPPT 150/35 and smartshunt 500A)

Safe connection (insulated)

use ADUM 1201 for galvanic isolation between ESP and Victron Devices (or make an insulated cable for Ve.direct)

Ve.Direct downwards	Ve.Direct upward	Purpose (wire color)	connect	ADUM1201 #2	ADUM1201 #1	connect	ESP8266 pin	ESP32 pin	USB TTL cable
1	1	GND (black)	<- ->	GND2	GND1	<- ->	GND	GND	GND
2	2	RX (red)	<- ->	VOB	VIB	<- ->	D8 (TX)	GPIO17 (TX)	TX
3	3	TX (white)	<- ->	VIA	VOA	<- ->	D7 (RX)	GPIO16 (RX)	RX
4	4	5V or 3V3 (yellow)	<- ->	VDD2	VDD1	<- ->	3V3 or 5V	3V3 or 5V	3V3 or 5V

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---

Installation

You can install this component with ESPHome external components feature like this:

external_components:
  - source: github://KinDR007/VictronMPPT-ESPHOME@main

uart:
  id: uart_0
  tx_pin: D8  # Not used! The communication is read-only
  rx_pin: D7
  baud_rate: 19200
  rx_buffer_size: 256

victron:
  id: victron0
  uart_id: uart_0

sensor:
  - platform: victron
    victron_id: victron0
    panel_voltage:
      name: "Panel voltage"
    battery_voltage:
      name: "Battery voltage"
    battery_current:
      name: "Battery current"

or just use the esp8266-example.yaml as proof of concept:

# Install esphome
pip3 install esphome

# Clone this external component
git clone https://github.com/KinDR007/VictronMPPT-ESPHOME.git
cd VictronMPPT-ESPHOME

# Create a secret.yaml containing some setup specific secrets
cat > secrets.yaml <<EOF
mqtt_host: MY_MQTT_HOST
mqtt_username: MY_MQTT_USERNAME
mqtt_password: MY_MQTT_PASSWORD

wifi_ssid: MY_WIFI_SSID
wifi_password: MY_WIFI_PASSWORD
EOF

# Validate the configuration, create a binary, upload it, and start logs
esphome run esp8266-example.yaml

The uart_id and victron_id is optional if you use a single UART / victron device. All sensors are optional.

The victron device pushs one status message per second. To reduce the update interval of the ESPHome entities please use the throttle parameter to discard some messages.

Entities

Binary sensors

Label	Sensor name
LOAD	load_state
Relay	relay_state

Sensors

Label	Sensor name
AC_OUT_V	ac_out_voltage
AC_OUT_I	ac_out_current
AC_OUT_S	ac_out_apparent_power
CE	consumed_amp_hours
CS	charging_mode_id
DM	midpoint_deviation_of_the_battery_bank
ERR	error_code
HSDS	day_number
MPPT	tracking_mode_id
I	battery_current
I2	battery_current_2
I3	battery_current_3
IL	load_current
MODE	device_mode_id
MON	dc_monitor_mode_id
OR	off_reason_bitmask
P	instantaneous_power
PPV	panel_power
SOC	state_of_charge
T	battery_temperature
TTG	time_to_go
VPV	panel_voltage
V	battery_voltage
V2	battery_voltage_2
V3	battery_voltage_3
VM	midpoint_voltage_of_the_battery_bank
VS	auxiliary_battery_voltage
WARN	warning_code
H1	depth_of_the_deepest_discharge
H2	depth_of_the_last_discharge
H3	depth_of_the_average_discharge
H4	number_of_charge_cycles
H5	number_of_full_discharges
H6	cumulative_amp_hours_drawn
H7	min_battery_voltage
H8	max_battery_voltage
H9	last_full_charge
H10	number_of_automatic_synchronizations
H11	number_of_low_main_voltage_alarms
H12	number_of_high_main_voltage_alarms
H13	number_of_low_auxiliary_voltage_alarms
H14	number_of_high_auxiliary_voltage_alarms
H15	min_auxiliary_battery_voltage
H16	max_auxiliary_battery_voltage
H17	amount_of_discharged_energy
H18	amount_of_charged_energy
H19	yield_total
H20	yield_today
H21	max_power_today
H22	yield_yesterday
H23	max_power_yesterday

Text sensors

Label	Sensor name
Alarm	alarm_condition_active
AR	alarm_reason
BMV	model_description
CS	charging_mode
ERR	error
FW	firmware_version
FWE	firmware_version_24bit
HC#	hardware_revision
MODE	device_mode
MON	dc_monitor_mode
MPPT	tracking_mode
OR	off_reason
PID	device_type
WARN	warning
SER#	serial_number

Debugging

If this component doesn't work out of the box for your device please flash the debug-esp8266-example.yaml and create an issue providing the full ESPHome log.

esphome run debug-esp8266-example.yaml

Thanks

Big thanks for help to ssieb for the support!